Belting



wm, M, 1924. 3,5%,753

va.. B. CHISHOLM BELTING' Filed Nov. 20, 1920 iilatented @ich lei, i924.

narran LESTER B. CHSHDLM, F MELRSE, MASSACHSET'V@ BELTING.

Alapphleetion nled November 0, 1920. Serial No. Llld.

To all whom/,it may coowe'm:

Be it known that l., Lnsrnn B. (inserierenof Melrose, in the county ot' Middlesex and State ot' Massachusetts, have invented a new and useful `improvement in Belting, ot' which the following is a full, clear, and exact description, reference being; had to the accompanying; drawings, forming a part of this speciiication, in explaining its nature. 'The invention relates to helting for the transmission of poweiand essentially that .made oi' -iabric material for use on flat faced pulleys.

The object of the invention .is to provide l5 a better running belting than that hereto- `iore 'employed and to provide means Where by the life of the belting will be prolonged.

These ohjects are attained by providing a helting having; the inherent capability of 2e -niaking its sides hug the pulley around which the helting is passed. This tends to keep, the baiting centered upon the pulley and minimizes slippage between the helting and thel pulley. 4It also prevents wear or.

2,5 ireying 'of the belting along its side edges,

which is a common'dilliculty with the present type ot belting and arises by the ruhhing ciE the helting against the flanges of the Jnlley or supports carryingthe pulley. The manner in which the belting is made to have the inherent capability of 'making i'tssides hug the pulley as aforesaid can leest he seen hy :reference to the drawings in ywhich is shown a piece; of helting illustrative oft the invent-ion and comprising a woven structure.,

Figure 1 is a' plan of the helting.

Fig. 2 is across section'thereo.

Fig. 3 is a diagrammatic plan of certain @l0 unravelled portions of the helting shown for the 'purpose of capabilities vresiding in it as will later he en lained.

ig. t is a cross section of the helting in M enlarged detail.

Referring to 'the drawings: l

1 represents a piece of the helting of `which 2 represents 'the under 'or Working ace of the heltin'g, 3 the upper face or back 5@ oi" the helting and il, l the respective sides thereof.

By reference to Fig. 2 it Will be seen that the belt-ing has normally a certain bend or angnlarity in crossisection which tends to F throw the sides 4, 4f inthe general directionl oi' the under face of the helting. Such illustrating certainl angularity is initially attained hy forming Within the belting on the upper face or vbacl thereoi1 a raised cord or rib 5 entendine,- longitudinally. A

In Fig. 4 Where the Woven structure of the heltng is shown in enlarged detail, 6 represents Warp on the hack and 7 haelt. pick. 8 represents Warp and El pick on the under face. 10 and l1 represent, respectively, warp and piek at either edge. l2 is stuing Warp and 13 binder Warp.

As thus indicated the rib 5 is produced by the addition to the Woven structure .of

y more ends of back Warp 6 at the particular point where the cord or rib is desired than elsewhere. There are also several ends -of stuiling vwarp l2 placed Within the hody oi the belting beneath the rib which assist in ,giving character to the rib. The stuffing warp beneath the rib and also that along the sides ot the helting assist also in giving strength and hody to the entire structure. When the beltintgis Woven the back pick 7 weaves through the extra ends forming the rib on the hack, While the pick 9 weaves through the plain fabric onthe face of the -lwltingl The etlect is that the belting thus formed is made to have a certain angularity or body flexure, when viewed in cross section as shown in Fig. 2 or such bend. that the sides ofthe belting are turned in the general direction of its -under face and Will accordingly initially contact with the pulley around lwhich the helting is running and under tension Will be made to flatten out and hug the pulley.

(lne reason Why the helting has inherent transverse body lexure, and hence hugs the pulley at and near its edges, is that the under -face picks 9 are shorter than the hack picks 7 inasmuch as'th'e back picks must Weave through the raised cord or rib on the hack of the helting; `consequently the sh0rter'picks will tend to exert a pull on the sides ofthe belting.

lt is also to be observed by reference to Fig. 3, which shows diagrannnatically an unraveled portion of theA pick, that the Weaving of the hack pick 7 through the raised cord or rib on the `haelt tends to eect a bend in the thread, While the under face ick 9 remains substantially unbent. The ends thus formed in the back picks collectively assist in imparting an angularity to the belting and throw the sides thereof in the general direction oli' its under face Cil n y aan in accordance ywith the purpose of the invention as before outlined.

In practice the belting is customarily made with from to 60 picks to the inch reckonin each face and back pick as one pick eac rIhis gives desirable strength and body to the belting.

In the claims I use the term transverse fiexure to define a lexure visible in transverse section as illustrated in Figs. 2 and 4.

Having thus fully described my invention, I claim and desire to secure by Letters Pat ent of the United States As an article of mamitacture5 machine belting of Woven material having inherent transverse angular body iexure induced by the weave structure.

2. AS an article of manufacture, macnine baiting of woven material characterized by inherent transverse angular body fiexure induced by the presence of a rib extending along the back of said belting and formed in the weave structure thereof.

3, As an article of manufacture, machine belting of multiple ply interwoven fabric material characterized by inherent transverse angular body fiexure induced by the presence, in a ply thereof, of a rib extending longitudinally' of the belting and formed y the weave structure.

4. As an article of manufacture, machine belting of multiple @ply interwoven fabric materiaischaracterized by inherent transverse angular body flexure induced by the bunching together of a number of warp threads to form a rib extending,r longitudinally, said bunched warp threads being bound by weft threads interwoven therewith. As an article of manufacture, machine belting of two-ply interwoven fabric material characterized by inherent transverse body lexure induced partially by the pres ence in a portion of one pry ci u greater number of warp threads than in tbc adjacent corresponding portion of the other ply and partially by the lpresence between said adjacent portions o` tbe lies of a number of closely spaced stuigng Warp threads.

6. As an article of manufacture, machine belting of two-ply interwoven fabric material, characterized by inherent transverse body fiexure induced by an area of augmented warp in one ply accentuated by stuffing Warps between the two plies adjacent said aul ented warp, said augmented warp being tightly interwoven with weft threads to form a`rib extendin,"lr longitudinally of the baiting, and said s tuiing warps being confined by binding threads connecting the plies.

7. As an article of manufacture, machine belting of `two-ply interwoven fabric material characterized by inherent transverse -body iiexure induced by the presence in a portion of one ply of a greater number of warp threads than in the adjacent correspondinf,Y portion of the other ply. the warp threads in the ply of less number being closely spaced.

8. As an article of manufacture. machine belting comprising.,r a multiple ply interwoven fabric. characterized by linherent transverse body fiexure induced by differerlrces in the weave structure of respective p ies 9. As an article of manufacturemachine belting of Woven material having inherent transverse body iexure, the concave surface of said belting being,r substantially smooth and the convex surface being woven. with a longitudinal rib.

LESTER B, CHISHOLM. 

